DRIVING ASSISTANCE DEVICE AND COMPUTER PROGRAM

Abstract

There are provided a driving assistance device and a computer program that can identify a recommended travel path to a parking lot that is where to park a vehicle and can appropriately provide driving assistance. Specifically, it is configured to obtain a parking lot in which a vehicle is parked at a destination, generate a travel path recommended for the vehicle to travel along from a travel start point to an entrance to the parking lot, using at least highly accurate map information 16 including information about lanes, facility information 17 including information about the entrance to the parking lot, and connection information 18 indicating a connection relationship between lanes included in an entry road and the entrance to the parking lot, and provide driving assistance for the vehicle based on the generated travel path.

Description

Claims

1. A driving assistance device comprising: parking lot obtaining means for obtaining a parking lot in which a vehicle is parked at a destination;travel path generating means for generating a travel path recommended for a vehicle to travel along when moving from a travel start point to an entrance to the parking lot, using at least road information including information about lanes, facility information including information about the entrance to the parking lot, and connection information indicating a connection relationship between lanes included in an entry road and the entrance to the parking lot, the entry road being a road facing the entrance to the parking lot; anddriving assistance means for providing driving assistance for a vehicle based on the travel path.

2. The driving assistance device according to claim 1, wherein the connection information includes information that identifies, for each lane included in the entry road, whether the vehicle can enter the entrance to the parking lot from the lane.

3. The driving assistance device according to claim 1, comprising outside-a-road configuration information obtaining means for obtaining outside-a-road configuration information that identifies a region between the entry road and the entrance to the parking lot through which a vehicle can pass, wherein the travel path generating means generates a travel path being a part of the travel path and corresponding to movement from the entry road to the entrance to the parking lot, using the connection information and the outside-a-road configuration information.

4. The driving assistance device according to claim 1, wherein the travel path generating means constructs a lane network for a road on which a vehicle travels, using the road information, the lane network being a network representing movement into lanes that can be selected by a vehicle,sets, in the lane network, an entry point on the entry road at which the vehicle starts entering the parking lot, andsearches for a route that connects the travel start point to the entry point, using costs added to the lane network, and generates, based on a searched route, a travel path being a part of the travel path and corresponding to movement from the travel start point to the entry road.

5. The driving assistance device according to claim 1, comprising: passage information obtaining means for obtaining passage information about a passage in the parking lot through which a vehicle can pass;parking space information obtaining means for obtaining parking space information about a parking space provided in the parking lot; andintra-parking lot travel path generating means for generating an intra-parking lot travel path, using the passage information and the parking space information, the intra-parking lot travel path being a travel path recommended for a vehicle to travel along when moving from the entrance to the parking lot to a parking space in which a vehicle is parked, wherein the driving assistance means provides driving assistance for a vehicle based on the intra-parking lot travel path.

6. The driving assistance device according to claim 5, wherein the intra-parking lot travel path generating means constructs a parking network using the passage information, the parking network being a network representing a course in the parking lot along which a vehicle can pass, andsearches for a route that connects the entrance to the parking lot to a parking space in which a vehicle is parked, using costs added to the parking network, and generates the intra-parking lot travel path based on a searched route.

7. The driving assistance device according to claim 5, wherein the parking lot is a parking lot belonging to a facility,the driving assistance device comprises: pedestrian passage information obtaining means for obtaining pedestrian passage information about a passage in the parking lot through which a pedestrian can pass;facility entrance information obtaining means for obtaining facility entrance information about an entrance to the facility; andwalk course generating means for generating, using the pedestrian passage information and the facility entrance information, a walk course recommended for a user to move along from a parking space in which a vehicle is parked to the entrance to the facility, andthe intra-parking lot travel path generating means selects a parking space in which a vehicle is parked, taking into account the walk course, and generates the intra-parking lot travel path.

8. The driving assistance device according to claim 7, wherein the walk course generating means constructs, using the pedestrian passage information, a walk network targeting a section in which a user moves on foot from the parking lot to the facility, the walk network being a network representing a course along which a user can move on foot, andsearches for a route that connects a parking space in which a vehicle is parked to the entrance to the facility, using costs added to the walk network, and generates the walk course based on a searched route.

9. The driving assistance device according to claim 1, comprising speed plan creating means for creating a speed plan for a vehicle that travels along the travel path, wherein the driving assistance means provides driving assistance for a vehicle based on the speed plan.

10. The driving assistance device according to claim 9, comprising: point identifying means for identifying, using the road information and the facility information, speed change points in the travel path at which a speed of a vehicle changes, whereinthe speed plan creating means generates, for each of the speed change points, a recommended speed at which the vehicle passes through the speed change point, and creates a speed plan such that a speed change between the speed change points satisfies a predetermined condition.

11. A computer program for causing a computer to function as: parking lot obtaining means for obtaining a parking lot in which a vehicle is parked at a destination;travel path generating means for generating a travel path recommended for a vehicle to travel along when the vehicle moves from a travel start point to an entrance to the parking lot, using at least road information including information about lanes, facility information including information about the entrance to the parking lot, and connection information indicating a connection relationship between lanes included in an entry road and the entrance to the parking lot, the entry road being a road facing the entrance to the parking lot; anddriving assistance means for providing driving assistance for a vehicle based on the travel path.